OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

fold-const.c (fold_binary): Remove duplicate folding of comparison of non-null ADDR_EXPR against null.

Browse Source 
2007-03-05  Richard Guenther  <rguenther@suse.de>

	* fold-const.c (fold_binary): Remove duplicate folding
	of comparison of non-null ADDR_EXPR against null.

From-SVN: r122551
This commit is contained in:
Richard Guenther 2007-03-05 14:49:02 +00:00 committed by Richard Biener
parent 3cf0c3c57e
commit 9dc167ec4a
2 changed files with 5 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2007-03-05 Richard Guenther <rguenther@suse.de>
* fold-const.c (fold_binary): Remove duplicate folding
of comparison of non-null ADDR_EXPR against null.
2007-03-05 Richard Guenther <rguenther@suse.de>
Dorit Nuzman <dorit@il.ibm.com>

8
gcc/fold-const.c
View File

@ -11159,14 +11159,6 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
&& code == EQ_EXPR)
return fold_build1 (TRUTH_NOT_EXPR, type, arg0);
/* If this is an equality comparison of the address of a non-weak
object against zero, then we know the result. */
if (TREE_CODE (arg0) == ADDR_EXPR
&& VAR_OR_FUNCTION_DECL_P (TREE_OPERAND (arg0, 0))
&& ! DECL_WEAK (TREE_OPERAND (arg0, 0))
&& integer_zerop (arg1))
return constant_boolean_node (code != EQ_EXPR, type);
/* If this is an equality comparison of the address of two non-weak,
unaliased symbols neither of which are extern (since we do not
have access to attributes for externs), then we know the result. */